Question:
At T (K), the molarity of 34% (w/w) NH$_3$ solution (density 0.9 g mL$^{-1}$) is:
At T (K), the molarity of 34% (w/w) NH$_3$ solution (density 0.9 g mL$^{-1}$) is:
Show Hint
For
Updated On: Jul 18, 2026
- 12
- 14
- 16
- 18
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Assume 100 g of solution.
For 34% (w/w) solution: \[ \text{NH}_3 = 34\,g,\quad \text{water} = 66\,g \]
Step 2: Convert mass of solution to volume.
Density = 0.9 g/mL: \[ \text{Volume} = \frac{100}{0.9} \approx 111.11 \, mL = 0.1111 \, L \]
Step 3: Calculate moles of NH$_3$.
Molar mass of NH$_3$ = 17 g/mol: \[ n = \frac{34}{17} = 2 \, mol \]
Step 4: Calculate molarity.
\[ M = \frac{2}{0.1111} \approx 18 \]
Step 5: Final conclusion.
\[ \boxed{18} \]
For 34% (w/w) solution: \[ \text{NH}_3 = 34\,g,\quad \text{water} = 66\,g \]
Step 2: Convert mass of solution to volume.
Density = 0.9 g/mL: \[ \text{Volume} = \frac{100}{0.9} \approx 111.11 \, mL = 0.1111 \, L \]
Step 3: Calculate moles of NH$_3$.
Molar mass of NH$_3$ = 17 g/mol: \[ n = \frac{34}{17} = 2 \, mol \]
Step 4: Calculate molarity.
\[ M = \frac{2}{0.1111} \approx 18 \]
Step 5: Final conclusion.
\[ \boxed{18} \]
Was this answer helpful?
0
0
Top AP EAPCET Chemistry Questions
- The four quantum numbers of the valence electron of potassium are :
- The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is
- In which of the following the election gain enthalpy of elements is correctly arranged?
- The radii of $ \text{F,}{{\text{F}}^{-}}\text{O} $ and $ {{\text{O}}^{2-}} $ are in the order
- Which of the following has the highest first ionization potential?
View More Questions
Top AP EAPCET Solutions Questions
Evaluate the correctness of the given statements.
I. Negative deviation occurs when A-B interactions are stronger than A-A and B-B.
II. Reverse osmosis requires applied pressure greater than osmotic pressure.Aqueous CuSO4 solution was electrolysed by passing 2 amp of current for 10 min. What is the weight (in g) of copper deposited at cathode? (Cu = 63 u; F = 96500 C mol-1)
Match the following:
Property Expression A. π I. Kb · m B. ΔTf II. Kf · m C. ΔTb III. CST D. (P0 - P) / P0 IV. (n1 / (n1 + n2)) - 1.06 g of Na$_2$CO$_3$ (molar mass = 106 g mol$^{-1}$) is dissolved in 500 g water. What is its molality?
- 34.2% (W/V) sucrose $ \left( \text{C}_6\text{H}_2\text{O}_1\right) $ solution is isotonic with 18% (W/V) of unknown solution X. Formula of X is
View More Questions
Top AP EAPCET Questions
- A body is projected from the ground at an angle of $\tan^{-1} \left( \frac{8}{7}\right)$ with the horizontal. The ratio of the maximum height attained by it to its range is
- The four quantum numbers of the valence electron of potassium are :
- A lens forms real and virtual images of an object, when the object is at $u_{1}$ and $u_{2}$ distances respectively. If the size of the virtual image is double that of the real image, then the focal length of the lens is (take, the magnification of the real image as $m$ )
- Two spheres $P$ and $Q$, each of mass $200\, g$ are attached to a string of length one metre as shown in the figure. The string and the spheres are then whirled in a horizontal circle about $O$ at a constant angular speed. The ratio of the tension in the string between $P$ and $Q$ to that of between $P$ and $O$ is $(P$ is at mid-point of the line joining $O$ and $Q$ )
- The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is
View More Questions